723 サブミクロンゴム粒子強化エポキシ樹脂のき裂先端ひずみ場の測定(GS.A 先端材料の破壊と強度)

概要

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Epoxy resin is widely used for engineering components as adhesive and matrix materials due to its prior properties. However, the pure epoxy resin is brittle. To improve the fracture toughness of the epoxy resin, rubber particles are mixed with epoxy resin. In the present study, we measured the fracture toughness of unmodified epoxy resin and rubber-modified epoxy resin using single-edged notch bending specimens. The distributions of strain around a crack tip were measured using a micro-video-scope and the digital image correlation method (DICM). The measured distribution of strain is compared with that estimated using the finite element method (FEM) in conjunction with Gurson's model, which can well describe the yielding of porous materials such as rubber-modified epoxy resin. The measured distribution of strain around a crack tip was similar to that obtained by the three dimensional FEM with Gurson's model.
一般社団法人日本機械学会の論文
2007-10-24